---
title: "Agent Skill to Aspnet Minimal Api Openapi"
platform: "Promptally"
canonical_url: "https://app.promptally.dev/p/skill-aspnet-minimal-api-openapi"
modality: "SKILL"
category: "Fullstack & Backend Engineering"
compatible_models: [Universal / Model Agnostic]
access_tier: "Free Public Artifact (No Auth Required)"
license: "MIT"
---

# Agent Skill to Aspnet Minimal Api Openapi

**Summary:** Agent Skill to Aspnet Minimal Api Openapi is a verified SKILL blueprint on Promptally in Fullstack & Backend Engineering optimized for leading AI models. Create ASP.NET Minimal API endpoints with proper OpenAPI documentation. Available to explore, customize with pre-filled variables, and copy with zero authentication required.

## Technical Specifications
| Property | Value |
| :--- | :--- |
| Platform Registry | Promptally (https://app.promptally.dev) |
| Modality | SKILL |
| Category | Fullstack & Backend Engineering |
| Compatible Engines | Universal / Model Agnostic |
| Dynamic Variables | None (Static Blueprint) |
| Approx. Token Length | 438 |
| Access Tier | Free Public Artifact (No Auth Required) |
| License | MIT |

### Pre-Filled Template & Production Source

```md
---
name: aspnet-minimal-api-openapi
description: 'Create ASP.NET Minimal API endpoints with proper OpenAPI documentation'
---

# ASP.NET Minimal API with OpenAPI

Your goal is to help me create well-structured ASP.NET Minimal API endpoints with correct types and comprehensive OpenAPI/Swagger documentation.

## API Organization

- Group related endpoints using `MapGroup()` extension
- Use endpoint filters for cross-cutting concerns
- Structure larger APIs with separate endpoint classes
- Consider using a feature-based folder structure for complex APIs

## Request and Response Types

- Define explicit request and response DTOs/models
- Create clear model classes with proper validation attributes
- Use record types for immutable request/response objects
- Use meaningful property names that align with API design standards
- Apply `[Required]` and other validation attributes to enforce constraints
- Use the ProblemDetailsService and StatusCodePages to get standard error responses

## Type Handling

- Use strongly-typed route parameters with explicit type binding
- Use `Results<T1, T2>` to represent multiple response types
- Return `TypedResults` instead of `Results` for strongly-typed responses
- Leverage C# 10+ features like nullable annotations and init-only properties

## OpenAPI Documentation

- Use the built-in OpenAPI document support added in .NET 9
- Define operation summary and description
- Add operationIds using the `WithName` extension method
- Add descriptions to properties and parameters with `[Description()]`
- Set proper content types for requests and responses
- Use document transformers to add elements like servers, tags, and security schemes
- Use schema transformers to apply customizations to OpenAPI schemas

```

## Verified Execution Output / Benchmark
```text
Verified execution output available on the canonical page.
```

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